While it may have been partly tongue in cheek, Hat has the right of it when he says that this survey tells you more about people's goals and self-image than it does about the affect music has on intelligence. People are notorious for selecting music that fits who and what they want to be, after all. My classmates who didn't give a crap about their schoolwork were not suddenly made any dumber when Blink 182 came on the scene, they just flocked to a band that reflected their laid back and somewhat contrary attitude, that's all.